<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>登录页面</h1>
    <form action="">
        <input type="text" name="username" placeholder="用户名"><br>
        <input type="text" name="password" placeholder="密码"><br>
        <input type="button" value="登录" @click="login()">{{info}}
    </form>
<!--引入axios和vue-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        let v = new Vue({
            el:"form",
            data:{
                info:""
            },
            methods: {
                login:function () {
                    let data = new FormData(document.querySelector("form"));
                    axios.post("/login",data).then(function (res) {
                        if(res.data==1){//登录成功，跳转到首页
                            location.href="/";
                        }else if(res.data==2){
                            v.info = "用户名错误";
                        }else {
                            v.info="密码错误";
                        }
                    });
                }
            }

        })
    </script>
</body>
</html>